Pressure-regulating valve



vNov.` 11, 1930. c. H. DocKso 1,781,054

PRESSURE REGULATING VALVE Filed Febl, 1925 2 Sheets-Sheet 1 PatentedNov. l1, 1930v y UNITED STATES PATE-NTy OFFICE CHARLES H. nocxsoN, orDETROIT, MICHIGAN rnEssUaE-BEGULATING vanvn r Application iiled February1, 1923. Serial No. 616,488.

This invention relates to fluid pressure the following description takenwith the acregulating valves such as are used in reduccompanyingdrawings in which: ing and regulating the gas pressure obtained Fig. 1is a plan view of a regulating valve from cylinders of gas underpressure and embodying this invention;

delivered to consuming devices such as blow- Fig. 2 is a verticalsectional view of the 65 pipes. same on line 2-2 of Fig. 1;

In pressure reducing valves as heretofore Fig. 3 is a plan view of thebody of the constructed the main body has been cast with valve casing;bosses or lugs projecting outward beyond its Fig. 4 isa plan view of thevalve seat asoutline, such bosses being tapped to receive sembly; 60

inlet and outlet pipes and pressure gages. Fig. 5 is a bottom plan viewof the dia- To finish the exterior of this type of body, phragm clampingplate; and special machining operations are necessary, Fig. 6 is a planview of the pressure adwhich increase the cost of production. Acjustingcushion plate.

cording to this invention the casing body is4 Referring to the drawings,the casing of 65 cast free from all exterior bosses so that it the valvecomprises a main hollow body 10 may be readily chucked and machined,thereexternally threaded at one end to receive a by lessening its costand producing a casing bonnet or front end cap 11 and internallyhavingabetter appearance. The body of the threaded at the opposite endto receive a 2 casing may be drilled and tapped at proper rear end cap12. As shown in Figs. 2 and 70 points to receive the gas pipes andttings. 3, the main body 10, which may be of brass,

The valve head usually comprises a hard is cylindrical and entirely freefrom exterior rubber disc carried byayoke suspended from bosses or lugs.It has heretofore been ima flexible diaphragm. Because of theloosepracticable to machine and polish the outer 5 ness of the yoke, thevalve chatters considersurfaces of casing bodies because of the ex- 75ably during its operation and the impact of terior bosses thereon, sothe rough outer surthe disc against the inlet nozzle frequently face hasbeen painted to give the body a nbreaks the disc. In the 'presentinvention ished appearance. The improved body 10 means are providedwhereby the yoke is can be readily gripped by the usual lathe steadiedin its movements, greatly reducing chuck and its outer surface can beturned 80 the noise, and the valve disc is reinforced to down 1n -alathe to the d esired dimensions reduce its liability to break.Sometimes an 39d polished Without special machlmng maexcessive pressurebuilds up in the valve. Acplpulatlons and Wlthout the 'ddltlonalPaultcording to the present invention, this is remg, heretoforerequll'ed The body 10 may lieved by an improved means for yshearing thenbe dllued and tapped es at 101s 102, 85

103 104 and 105 to receive the various t. ggmphmgm at apredetermmed hlghpres tings of the valve. The usual or any suitable couplin connection 13may be fitted d rlljhe rtlto redulcmop (gif ,ghe gss into the openlng101 to mechanically couple 40 e were 0 e 7.a Ve 1S e emu y the valve toan outlet connection on a gas 90 pressure 0.11 the dlzlphragm I'OI Whlch.the storage cylinder and to lead the gas into Seat`ca'rry1ng yqke 1Ssflspendel" According the inlet extension 106 that extends into and *50the present mentent an lmPIOYed adisingmlwiththe body 1o. The usual highlustlng meollo 1S PloVlded for Vefylng the and low pressure gauges H andL may be cou- Pressure aPPlled to the dlephragm ood oom pled to theopenings 102 and 103 the former 95 prises a helical spring that bearsagainst and communicating through 9, passage H with is arranged intandem with a'cushin plate the high pressure inlet; opening 101 and thebearing against the diaphragm. o ening 103 communicating with theinterior The above and other objects andnovel feao? the body 10. Theopening 104 may receive tures of the invention will be apparent from theusual hose connection union nipple 14 100 ency is counteracted by:1n-adjustable pres-v which leads to the (gas consuming device, such ias a blowpipe, an the opening 105'may receive Ea. lug 15 carrying a hook16 upon which a lowpipe may be hung when not 1n use. Some compressed gascylinders have convex heads with horizontal gas outlets whereas othershave concave heads with-vertical gas outlets. In order thatthelow-pressure gage, hose connection and hook may be located in theirmost desirable and handiest positions, these parts are interchangeablein the openings 103, 104 and 105.

The inward extension 106 has a gas inlet passage 107 and is threaded atits inner end to receive a fixed inlet nozzle 17 with which the valvedisc'18 cooperates to regulate the admission of as into'the valvechamber 10. The edges of t e valve disc 18, which is desirably ofmaterial such as hard rubber, sometimes check or break o due to theimpacts of the disc against the end of the nozzle 17. To reduce thisbreakage, it has been found desirable to support the periphery of thedisc by enclosing it in a tubular metal shell 19, as. illustrated inFig. 4.` The disc 18 and its reinforcing shell 19 are held in a threadedcavity 201 in a valve headholder 20 by a threaded retaining ring 21which bears against the upper outer edge of the valve disc 18 and itsreinforcing ring 19. The valve he-adholder 20 is secured by screws 221to the rear end of a yoke 22 that is suspended from the diaphragmY 23.Accordlngly, as the pressure in the chamber 10 increases the diaphragm23, the yoke 22 and the valve disc 18 willy be raised to move the lattertoward the end of the inlet nozzle 17 to regulate the admission of gas.The variations of the pressure in the chamber 10 vibrate the sus endedyoke 22 which produces considera le chatter and noise. In order toreduce such vibration the valve head holder 20 has a projection or guide202 on its lower side that extends into a socket 121 in the inside ofthe cap 12. This projection has longitudinal slots 203 through its axisand an-axial socket 204 therein receives a screw 205 whereby the'slottedends of the projection may be spread to more closely fit the socket 121and reduce the vibration. A spring 206 that bears against the insideofthe cap 12 and against the valve seat holder20 also assists 'in reducingvibration of the yokes. 4

The spring 206 and the gas pressure against the diaphragm 23 tend tomove the seat 18 against the nozzle 17, but this tend'- sure applied tothe opposite sideof the diaphragm. A shoulder 111. on the bonnet 11clamps the peripheral edge of the diaphragm 23v against the front edgeof the body 10 and a stem 222 ofthe yoke 22 projects through a centralopening-in the diaphragm and is engaged' bya threaded clamping plate 24to vclamp the yoke and diaphragm' together.

Appropriate gaskets of lead or other suitable material may be insertedbetween the diaphragm and the parts to which 1t1s clamped. The ressure aainst the ydiaphragm 23 is deslrably apphed through two yieldablemembers arranged in tandem. One of these lmembers consists of a rockablepressure distributing spring cushion plate 25 which, as shown in Figs. 2and 6, has a central openin 251 to fit the boss 241 of the clamping pate 24. The plate 25 is dished and may be recessed at intervals in ltsperiphery to provide feet 252 which engage the upper surface of theclamping plate 24. A helical spring 26 at one end engages an annularportion on the upper side of the'plate 25 and at its other end engagesan anti-friction plate 27 that is engaged by an adjusting screw 28threaded to fit a threaded opening in the bonnet 11 and provided with ahandle 281 at its outer end. The springs 25 and 26 are of differentstrengths, so that momentary pressure variations may be taken up by thelweaker cushion spring 25, and the valve will deliver a more constant gaspressure. The spring plate 25 balances thev diaphragm against twistingforces, thus relieving the diaphragm and tending to cause the guide 202-to move smoothly in the socket 121. The adjustment of the handle 281accordingl determines the delivery pressure in the c amber 10, which isregistered on the gage L. As the gas is withdrawn from the chamber 10',the valve seat moves away from and t0- ward the nozzle 17 to regulatethe admission of gas. Itis desirable that some means be provided forrelieving excessive pressure which may arise in the chamber 10. Theclamping plate 24 may consist of sections of two different diameters,the section 242 of smaller diameter engaging the upper side of thediaphragm and leaving a space 29 between its peripheral edge and theinside of the bonnet 11. The outer edge of the section 242 is desirablyprovided with shearing edges 243 to shear or puncture the diaphragm whenit is pressed outwardly by the excessive pressure. These shearing edgesare between openings 244 extending through the plate 24 at intervals inthe periphery of the section 242. The plate 24 is so adjusted that it isnormally spaced from the shoulder 112 on the inside of the bonnet 11,but when excessive pressure obtains in the chamber 10 the larger sectionabuts against the shoulder 112 and increased pressure cales thediaphragm 23 to be sheared by the edges 243 to release the pressurethrough the openings 244, and through openmgs 113 1n the bonnet 11 tothe atmosphere. l

Certain features of the invention are of general application with othertypes of valves, and various details may be modified without departingfrom the spirit of the IOL said diaphragm having means adapted to in oneof said invention, which is therefore not limited to the exactconstruction shown and described.

I claim 1. In a pressure regulating valve for attachment to tankscontaining gas under pressure, the combination of a casing member havinga pressure chamber therein the casing member having a plurality ofidentically formed and threaded openings disposed at an angle to theaxis of the casing and communicating 'with the pressure chamber, aninlet nipple secured in one of said openings, an outlet nipple securedin another of said openings, and a pressure gage secured in another ofsaid openings, the outlet nipple and the pressure gage being themselvesof different contour but interchangeable in the latter openings, toenable the shape of the pressure regulating valve to be changed so thatit can be used with diierent kinds of pressure tanks.

2. In a pressure regulating valve, the combination of a casing providinga chamber having an inlet and an outlet, said casing having a guidesocket therein, a nozzle at the discharge end of said inlet, a valvedisk cooperating with said nozzle, a pressure-responsive carrier forsaid disk having an expandible guide stem itting in said socket andmeans for adjusting the expandible guide stem to obtain a snug buteasy-sliding iit of the guide stem in the socket.

3. In a pressure regulating valve, the combination of a casing providinga chamber having an inlet and an outlet, said casing having a guidesocket therein, a nozzle at the discharge end of said inlet, a yokemovable in response to pressure variations in said chamber, vsaid yokehaving a transversely' slotted expandible guide stem movable in saidsocket, means for adjusting the expandible guide stem to obtain a snugbut easy-sliding fit of the guide stem in the socket, and a valve disksecured to said yoke and cooperating with said nozzle.

4. In a pressure regulating valve, the combination of a casing providinga chamber having an inlet and an outlet, a nozzle at the discharge endof said inlet, a yoke movable in response to variations in pressure andhaving a threaded recess, a threaded retainer fitting in said recess,and valve means comprising a non-metallic disk held in said recess bysaid retainer and adapted to be seated against said nozzle, anda metalshell tightly fitting the periphery of said disk to prevent the breakageof the latter by impact against said nozzle, the threaded retainer beingremovable to permit the valve means to be replaced or reversed end forend when worn.

5. In a pressure regulating valve, the combination -of a casing -havingan abutment therein, a diaphragm in said casing, and a movable platebetween said abutment and shear or puncture said diaphragm to relieveexcessive pressure in said casing.

6. In a pressure regulating valve, the combination of a casing having anabutment therein, a diaphragm in said casing, and a movable aperturedlate between said abutment and said diap ragm having means engageable bysaid diaphragm to shear the latter and relieve excessive pressure insaid casg. In a pressure regulating valve, the combination of a casinghaving an abutment therein, a diaphragm in said casing, anda movableapertured plate between said abut'- ment and said diaphragm comprisingportions of di'erent diameters leaving an annular space between theportion of larger diameter and said diaphragm, the portion of smallerdiameter having means adapted to shear said diaphragm to relieveexcessive pressure in said casing.

8. In a pressure regulating` Valve, the combination of a diaphragm` andmeans for applying pressure to said diaphragm comprising a resilientplate, an adjustable plate spaced therefrom, and a helical springbetween and normally bearing against said plates.

9. In a pressure regulating valve, the combination of a diaphragm, andmeans for applying pressure to said diaphragm comprising a resilientplate having a movable outer peripheral edge portion, and an adjustablespring bearing against said plate.

10. In a pressure regulating valve, the combination of a diaphragm, andmeans for applying pressure to said diaphragm comprlsing an annularresilient plate having its outer periphery recessed at intervals, and anadjustable helical spring bearing agalnst said plate within suchrecessed portion.

11. In a pressure regulating valve, the combination of a diaphragm, avalve-carrying member, means clamping said dia-- phragm to said member,and means for applying pressure to said diaphragm comprising a resilientplate bearing against such clamping means and a spring bearing againstsaid plate.

12. In a pressure regulating valve, the combination of a diaphragm, avalve-carrying member, a. plate `clamping said diaphragm to said memberhaving means adapted to shear said diaphra to relieve excessive pressurein said casing, and means for applying pressure to said diaphragmprising a resilient plate bearing agalnst such vclamping plate and anadjustable spring' ,.bearing against said resilient plate.

13. In a pressure regulating valve for use with various kinds ofcontainers of gas under pressure, the combination of a casin providing achamber having an inlet and t readed openings; a high pressure gagecoupled openings; and a low pressure com- Y .threaded openings t outletnipple an th gage, an outlet nipple and a blowpipe supporting hookcoupled in the remaining e low pressure gage, the e hook beinginterchangeable in the openings, to enable the shape of the pressurereducing valve to be changed to conform to the culiarities of diierentkinds of gas supplying containers.

14. In a pressure regulatin valve,the combination of'an expandible iahragm, a s ring opposing the expansion o the diap ragm, and a pressuredistributing rocker l Ween the spring and the diaphragm to balance thediaphragm against forces tending to twist it. c

15. In a pressure re ulating valve, the combination of an inlet aving avalve seat, an expandible diaphragm, a valve head holder su ported bythe diaphragm and movable there y to cause vthe valve head toseat aguide on the valve carrier to direct the va ve head squarely to itsseat,a spring opposing the expansion of the diaphragm, and balancing meansbetween the sprin and the diaphragm to overcome twisting orces upon thediaphragm that would tend to cause the valve carrier to be swayed fromside to side by the diaphragm.

16. In a pressure regulating valve, the combination of a chamberedportion having an inwardly projecting shoulder a diahragm distortable bypressure in the chamer, and a member carried by the diaphragm comprisingpuncturing means s aced a substantial distance inward from t e peripheryof the diaphragm, said member being arranged to engage said shoulder andto arrest and puncture the diaphragm when the diaphragm is distortedbeyond a predetermined safe limit, to relieve excessive pressure in thechamber.

In testimony whereof, I aliX my signature.

CHARLES H. DOGKSON.

